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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Test for dirty ground? posted by Jayme on September 17, 2007 at 12:15:09:
testing the earth gounding connection is not at all easy.
first you require another gound reference (a Vgood ground connection) say a 10ft copper rod or pipe into the ground (Tesla used to bury large copper plates 50+ft down to ensure a reasonable earth connection.
then you require a low impadance measuring bridge with the correct filters etc. This is a real EE job, and best left to the pro's.
Your DVM cound be giving allsorts of mis-readings and other noise pickups.
given that everthing will be relative to the earth connection and all differential voltages will be relative to whatever the earth is then i dont think you should overly worry at this point in time. There are greater caused of problems elsewhere.
sorry i konw it not a lot of help but i thought i would mention it before you go off on a wild goose chase.
As a side note it was only recently that i discovered when my 3 phase mains was being redone at the intake due to a live1 to live2 to earth short putting my mains voltage to 315v, that my apartment doesnt actually have any earth per-say. The "earth" is actually connected to the neutral wire at the intake!
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Follow Ups
- RE: Test for dirty ground? - chris_w 15:56:43 09/18/07 (0)
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